11988817 has 4 divisors (see below), whose sum is σ = 12017716. Its totient is φ = 11959920.

The previous prime is 11988811. The next prime is 11988827. The reversal of 11988817 is 71888911.

11988817 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1806336 + 10182481 = 1344^2 + 3191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11988817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11988811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13818 + ... + 14659.

It is an arithmetic number, because the mean of its divisors is an integer number (3004429).

Almost surely, 2^11988817 is an apocalyptic number.

It is an amenable number.

11988817 is a deficient number, since it is larger than the sum of its proper divisors (28899).

11988817 is an equidigital number, since it uses as much as digits as its factorization.

11988817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28898.

The product of its digits is 32256, while the sum is 43.

The square root of 11988817 is about 3462.4871118894. The cubic root of 11988817 is about 228.8717078550.

The spelling of 11988817 in words is "eleven million, nine hundred eighty-eight thousand, eight hundred seventeen".